1 /* $OpenBSD: profile.h,v 1.11 2010/07/09 18:44:10 kettenis Exp $ */ 2 /* $NetBSD: profile.h,v 1.6 1995/03/28 18:17:08 jtc Exp $ */ 3 4 /* 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)profile.h 8.1 (Berkeley) 6/11/93 33 */ 34 35 #define _MCOUNT_DECL static __inline void _mcount 36 37 #define MCOUNT \ 38 extern void mcount(void) __asm("__mcount"); \ 39 __weak_alias(mcount,__mcount); \ 40 void \ 41 mcount(void) \ 42 { \ 43 int selfpc, frompcindex; \ 44 int eax, ecx, edx; \ 45 \ 46 __asm volatile("movl %%eax,%0" : "=g" (eax)); \ 47 __asm volatile("movl %%ecx,%0" : "=g" (ecx)); \ 48 __asm volatile("movl %%edx,%0" : "=g" (edx)); \ 49 /* \ 50 * find the return address for mcount, \ 51 * and the return address for mcount's caller. \ 52 * \ 53 * selfpc = pc pushed by mcount call \ 54 */ \ 55 __asm __volatile ("movl 4(%%ebp),%0" : "=r" (selfpc)); \ 56 /* \ 57 * frompcindex = pc pushed by call into self. \ 58 */ \ 59 __asm __volatile ("movl (%%ebp),%0;movl 4(%0),%0" : \ 60 "+r" (frompcindex)); \ 61 _mcount(frompcindex, selfpc); \ 62 \ 63 __asm volatile("movl %0,%%edx" : : "g" (edx)); \ 64 __asm volatile("movl %0,%%ecx" : : "g" (ecx)); \ 65 __asm volatile("movl %0,%%eax" : : "g" (eax)); \ 66 } 67 68 #ifdef _KERNEL 69 /* 70 * We inline the code that splhigh and splx would do here as otherwise we would 71 * call recursively into mcount() as machdep.c is compiled with -pg on a 72 * profiling build. 73 */ 74 #define MCOUNT_ENTER _SPLRAISE(s, IPL_HIGH); __splbarrier() 75 #define MCOUNT_EXIT __splbarrier(); _SPLX(s) 76 #endif /* _KERNEL */ 77